Publicação
Polar marine biocorrosion and biofouling processes mediated by the trimeric autotransporter adhesin of Psychrobacter cibarius
| datacite.subject.sdg | 09:Indústria, Inovação e Infraestruturas | |
| datacite.subject.sdg | 12:Produção e Consumo Sustentáveis | |
| datacite.subject.sdg | 13:Ação Climática | |
| dc.contributor.author | Wang, Xiaoyu | |
| dc.contributor.author | Mao, Xiaomin | |
| dc.contributor.author | Wang, Yuyi | |
| dc.contributor.author | Peng, Lihua | |
| dc.contributor.author | Yang, Jin-Long | |
| dc.contributor.author | Liu, Tao | |
| dc.contributor.author | Power, Deborah Mary | |
| dc.contributor.author | Guo, Na | |
| dc.contributor.author | Liang, Xiao | |
| dc.date.accessioned | 2026-09-16T09:09:47Z | |
| dc.date.available | 2026-09-16T09:09:47Z | |
| dc.date.issued | 2026-11 | |
| dc.description.abstract | Polar oceans, a critical frontier for global resource development and strategic competition, impose extreme challenges on marine engineering materials. Among these, the combined effects of corrosion and fouling by bacterial biofilms are the major biotic factors accelerating material deterioration; yet, the molecular mechanisms by which polar marine bacteria drive these processes remain poorly understood. Using Psychrobacter, a dominant bacterial genus in polar marine environments, we explored the characteristics and mechanisms of both biofouling and biocorrosion induced by the biofilm of Psychrobacter cibarius. Here, we show that biofilms formed by the polar bacterium P. cibarius induce significantly more severe corrosion of cryogenic steel (EH40) and promote higher settlement and metamorphosis of the typical macrofouling mussel larvae than biofilms of the temperate species Pseudoalteromonas marina. Biofilms of P. cibarius contained higher levels of extracellular proteins, which correlated with higher biocorrosion and biofouling activity. Comparative genomics identified genes encoding a trimeric autotransporter adhesin (YadA), a unique extracellular protein present in P. cibarius but absent from P. marina. Deletion of the membrane-anchoring region of YadA abolished bacterium-surface fibrillar structures, markedly reduced bacterial adhesion, decreased extracellular protein secretion within the biofilm, and significantly suppressed both electrochemical corrosion and mussel larval settlement and metamorphosis. These findings demonstrate that the YadA adhesin is a key determinant of P. cibarius biofilmmediated biocorrosion and biofouling under polar marine conditions. This study provides a new direction for both biocorrosion and biofouling control in polar marine environments and a basis for developing adhesintargeted protective materials. | eng |
| dc.identifier.doi | 10.1016/j.corsci.2026.114183 | |
| dc.identifier.issn | 0010-938X | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/29445 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Elsevier BV | |
| dc.relation.ispartof | Corrosion Science | |
| dc.rights.uri | N/A | |
| dc.subject | Biofilm | |
| dc.subject | Microbiologically influenced corrosion | |
| dc.subject | Biofouling | |
| dc.subject | Polar marine bacterium | |
| dc.subject | Trimeric autotransporting adhesin | |
| dc.subject | Psychrobacter | |
| dc.title | Polar marine biocorrosion and biofouling processes mediated by the trimeric autotransporter adhesin of Psychrobacter cibarius | eng |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.startPage | 114183 | |
| oaire.citation.title | Corrosion Science | |
| oaire.citation.volume | 272 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Power | |
| person.givenName | Deborah Mary | |
| person.identifier.ciencia-id | 891A-8A44-3CAE | |
| person.identifier.orcid | 0000-0003-1366-0246 | |
| person.identifier.scopus-author-id | 7101806760 | |
| relation.isAuthorOfPublication | c68f5ffb-63f6-4c70-8957-29e464fb59c0 | |
| relation.isAuthorOfPublication.latestForDiscovery | c68f5ffb-63f6-4c70-8957-29e464fb59c0 |